I am inclined to agree that it can be. It really depends on how you use it, how much time you spend on it, and how pervasive you allow it to be part of your live.

There are those who have hundreds of 'friends'. I find this questionable. There are those who use FB as their primary form of communication. I find this problematic.

I myself limit my friends list to only those people I know in real life. I avoid using it as journal of my activities - people don't need to know the ins and outs of my daily life and I don't want to know theirs. I limit the amount of time I am on FB and tend to look at it as merely a form of entertainment. The exception to this rule is that I use Messenger to briefly manage communication with my out-of-town family. Even this gets down to business as I avoid 'chatting' with a preference to actually talking to them.

The result is that I consider my FB use to be healthier than what I understand is the norm.

I hear so many ugly and sad stories about people's FB use and what has become an obsessive reliance on it.

I think you need to question the time you spend on it. How often do you check on it? Are you cable of leaving your phone untouched when out with people in the real world or must you follow-up on every notification?